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622aa046f1
* Enabled SX_LNA_EN by default * Update I2C configuration for IO direction and pull settings --------- Co-authored-by: Thomas Göttgens <tgoettgens@gmail.com>
77 lines
2.8 KiB
C++
77 lines
2.8 KiB
C++
#include "driver/gpio.h"
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#include <Arduino.h>
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#include <Wire.h>
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// I2C device addr
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#define PI4IO_M_ADDR 0x43
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// PI4IO registers
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#define PI4IO_REG_CHIP_RESET 0x01
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#define PI4IO_REG_IO_DIR 0x03
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#define PI4IO_REG_OUT_SET 0x05
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#define PI4IO_REG_OUT_H_IM 0x07
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#define PI4IO_REG_IN_DEF_STA 0x09
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#define PI4IO_REG_PULL_EN 0x0B
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#define PI4IO_REG_PULL_SEL 0x0D
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#define PI4IO_REG_IN_STA 0x0F
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#define PI4IO_REG_INT_MASK 0x11
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#define PI4IO_REG_IRQ_STA 0x13
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// PI4IO
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#define setbit(x, y) x |= (0x01 << y)
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#define clrbit(x, y) x &= ~(0x01 << y)
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#define reversebit(x, y) x ^= (0x01 << y)
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#define getbit(x, y) ((x) >> (y)&0x01)
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void i2c_read_byte(uint8_t addr, uint8_t reg, uint8_t *value)
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{
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Wire.beginTransmission(addr);
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Wire.write(reg);
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Wire.endTransmission();
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Wire.requestFrom(addr, 1);
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*value = Wire.read();
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}
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/*******************************************************************/
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void i2c_write_byte(uint8_t addr, uint8_t reg, uint8_t value)
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{
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Wire.beginTransmission(addr);
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Wire.write(reg);
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Wire.write(value);
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Wire.endTransmission();
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}
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/*******************************************************************/
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void c6l_init()
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{
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// P7 LoRa Reset
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// P6 RF Switch
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// P5 LNA Enable
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printf("pi4io_init\n");
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uint8_t in_data;
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_CHIP_RESET, 0xFF);
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_read_byte(PI4IO_M_ADDR, PI4IO_REG_CHIP_RESET, &in_data);
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_IO_DIR, 0b11100000); // P5,P6,P7 as outputs
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_OUT_H_IM, 0b00011100); // High-Impedance
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_PULL_SEL, 0b11100011); // pull up/down select, 0 down, 1 up
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_PULL_EN, 0b11100011); // pull up/down enable, 0 disable, 1 enable
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_IN_DEF_STA, 0b00000011); // P0 P1 default to high level; button press triggers the interrupt
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_INT_MASK, 0b11111100); // P0 P1 interrupts enabled (0 = enable, 1 = disable)
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_OUT_SET, 0b10000000); // default output is 0
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_read_byte(PI4IO_M_ADDR, PI4IO_REG_IRQ_STA, &in_data); // read IRQ_STA to clear the flag
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vTaskDelay(10 / portTICK_PERIOD_MS);
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i2c_read_byte(PI4IO_M_ADDR, PI4IO_REG_OUT_SET, &in_data);
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setbit(in_data, 6); // enable SX_ANT_SW
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setbit(in_data, 5); // enable SX_LNA_EN
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i2c_write_byte(PI4IO_M_ADDR, PI4IO_REG_OUT_SET, in_data);
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}
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